FOR CATS & KITTENS 8 weeks or older. Convenient spot treatment for fast-acting, long-lasting control of fleas, ticks and chewing lice. Active Ingredients fipronil: 9.8% (S)-methoprene 11.8% INERT INGREDIENTS 78.4% TOTAL 100.0% Use: FRONTLINE® PLUS FOR CATS provides fast, effective and convenient treatment and control of fleas, ticks and chewing lice for cats and kittens. - Stops and prevents infestations - Kills adult fleas, flea eggs, and flea larvae - Prevents all flea stages (eggs, larvae, pupae) from developing - Kills fleas which may cause flea allergy dermatitis - Kills all stages of deer ticks (which may carry Lyme disease), brown dog ticks, American dog ticks, and lone star ticks - Prevents and controls infestations - Rapidly eliminates infestations with chewing lice - Can also be used on breeding, pregnant and lactating queens - Fast-acting - Long-lasting - Waterproof - Convenient to use FRONTLINE® PLUS FOR CATS contains fipronil and the insect growth regulator (IGR) (S)-methoprene. FRONTLINE® PLUS effectively targets all stages of fleas. Fipronil collects in the oils of the skin and hair follicles, and continues to be released from hair follicles onto the skin and coat, resulting in longlasting activity against fleas, ticks and chewing lice